The instant messaging service has completed a move to fully encrypt all the content within its app in a bid to make users' online lives a bit more private.

WhatsApp announced the move with a little yellow pop-up that reads: "Messages you send to this chat and calls are now secured with end-to-end encryption".

The tech industry loves encryption, but cops hate it with a vengeance because it essentially allows people to communicate without them being able to intercept the messages.

Terrorists are known to use encryption to make sure spooks can't snoop on their plans - although the Paris attackers used vulnerable text messages on burner phones to stay in touch before the atrocity.

So what's up with the changes to WhatsApp? Watch the video to find out...